Welding-torch.



lm. INWHPM ATTORNEY@ @f @WN www Patented Aug. 27, 1918.

r, zf'cfaql 'acfei WELDING TORLH APrLlcAxoN FILED MAY .\91s.

WITNESS '60 a.- socket connection 5 MICHAEL FISCHER, F RICHMOND,CALIFORNIA.

WELDING -TQRCIL T o. all whomz't may concern: 4

Be it knownithatl, MICHAEL FISCHER, n citizen of the United-"States,recidin at Richmond, thecounty of Contre ostn nud 6 State. Qi.Oaliforniuhhave invented certain new useful Improuements in 'clding-Torches, of which the following 1s a specification.

-My invention relates to torches for heat- 10 i metals Vin Athe welding,cutting and so er trentl'nenbthereof, and particularly to @rch thetlameof wlnch is produced by a of`oygen andacetylene gases. rMy vention,consists 'in certain 1mf it 'royements in-.oxy-ecetylene torenes .o tbeempressute injector type, 1n which the mixcliembe is' `located in thebod whilamethr; n.;

, liijnner tub'efor the acetylene, and a handle- 'heiid 4 iitted to'anduniting said shells and ,tubes in Such manner that the tubos ure sp' cedboth' from the shell and from each 'othen The handle head is formed withfor the f.\ ,gcn 'suppl and "with 'n socket connection (i .forte'awtylene supply. A duct in thc. heud lends 'to the oxygen tube and aduct (3' leads to the acetylene tube 2-5. 'lo Q5 lhe-other'end of thelmndle member is litl'cd thc regulating-valve-shell 7 in which isSpecicatlon of Letters Patent.

It will thus thatA the.' r

- .pfefeneh'hnamc'ks new nl lo tial `"mixing" ben; and, iinelly, toprol. sideelevation partly in seclulenl'od Ang'. 27, 1918.

Application led lay 6, 1918. Serial'No. 232,915.

locnlcd the needlc-vzllvc seat-member 8, as seen in Fig. 2. A duct J inthe shell'7 lende from the :n.-etylene tube 3 to a space 10 surroundingthe war end of the sent-member 8, said .space 10 communicating with anen circling groove il of said seat-member, and said groove communicateswith channels 12 formed in the forward angular end of the seat-member,which 'channelsY lead into grooves 13 in the tip of the seatmember, saidgrooves leading into the chamberM-of the mixing-member 15, which latter'is fitted to the shell 7.

Thus the courracof the oxygen is" from the connection 5, through the'duct 5' tube 2. duct 1i), space 7', and grooi'es 20nnd 21, into the'mixing chamber 14., and vthe vvolume of oxygen is controlled bythe-needle, valve 16, ns regulated by the screw 18,4'.

The two gases thus unite the mixu f chamber 14 and the Vpropiiion of'cac-i regulated und controlled. l.,

Now, in order I oeffect the thoipugh and iutinmle 4mixture of thegase'Jlfne-folliving menus nre employed, The mixingehnmbcr member llihusut ts'forward end a bore 15', which at its innerond conically.decl-mises' at 15"' to moet the mixing chamber 14. In the inner endofthe bore 15' is fitted a mixing plug 22, the base of which is concnvedat 22 complcmentally to and lies opposilc the conc-nvity 15" at the buseof the bore l5. 'Iluforward end of the plug 22 is likewise conceved at22a.nd in said plug are made lhc ducts 23 in annular series 110 near itsperiphery; said ducts leadinu from the concnvity 2;' and joining inwarly in has fitted to it the tip' The tipv has a rliued ductsl 23 whichlead into the con cavity 2'2".

A second mixing plug, similar in all rcspects and indicated by likenumerals, lies immediately in front of and coperates with the firstplug.

In front of the second plug is a. third mixing plug 24, thc forward endof which is like the previous plugs, but its rear portion has anexterior helica channel 25, communication with the rear end of which ishad through the holes 2.6 leading outwardly from its axis. The forwardend of the helical channel 25 communicates with the ducts of the forwardportion of the lug 24.

27 is a coupling sleeve, hol ing all these lugs in place and alsoconnectin up the jacket 28 of the nozzle member. T ie nozzle membercomprises the jacket 28 and the inner tube 29 spaced from the jacket. Ahole 29 leads into the jacket spaoe.- The inner tube'29 communicates atits rear end with the final mixing plug, and at its forward end it'spaced jacket 31.

The course'of the united gases' may now be traced from the initialmixing chamber 14.- This course is outwardly, forwardly and -inwardlythrough the first two-plugs', 'helic'ally about tlierear -portion of thei'rd plug, and forward and inwardly throii h its forward portion andthence through enoziilc tube an'd tip; I n, this tortuousfconrsem intiias moreover, these plugs' prevent "blacklfiring,

- which is' staked by uwimiens passa e thus formed, and is notlikelytoover reas the initial mixing chamber 14. The jacketing of the nozzle hastwo effectsg namely it tends t0' cool the nozzle, `which may be by4 airor water) soas tg reuce the tendency to back-fire, and alsofby suchcooling it prevents the tendenciy of the inner nozzle tube 29 to ex andunder ieatand thereby tend to affect t e stability o'f the inimurepassing through it. The jacketing of the tip .30 in like mannercontributes to these results. The needle valve control provides forincreasing or decreasing the area of the orifice o f the oxygen injectoras needed for the' Vdifferent sizes of interchangeable tips.

It is now proven in practice that a consuinption of one volume ofacetylene to one volume of oxygen results ina sayin of from three to teucubic feet per hour of welding, depending on the size of tip used. Theproportion maybe had and maintained in this torch, and givesla greaterstability to the llame.

I claim:-

l. 'A torch for the described purpose comprisingn. handle memberprovided with separate connections and passages for the gases; :imixngchamber member zzf which said passages separately lead; a controllable injector assemblage intermediate the handle member andniixingchambermember consistingr of a shell fitted to the handle-member,a nccdle-valve-scat member in the shell, a Spring-controlled normallvffl` i tracted needle-valve in the seat-member; and an adjusting screwfitted in the side wall of the shell and bearing on the rear end of thisneedle-valve; a series 'of plugs in said 75 mixiiig-chamber-memberformed with com-` y uuuiicating ducts constitut-ing` a"t`ort iicis"mixing passage leading fromA tliemixiiigchamber of said member; and anozzle meniber fitted to the mixing charriberlmember. A torch for the'describe-i parr edm'- prising a handle member provi ed;.,w,ith'

separate connections and 'passages for., thel gases; aniixng-cliamber-member linto which said passages separately-,lead 'acon- Sli f trollable injector intermediatef'ttie'f handle member andmixing-chamberiiienilifer.:'4 a" series of plugs' in said mixing-chambermember formed .with communcating'fluiffs onstitutin aitortuous mixing: ilead'- ,90. ing from e mixing-'chambercif'saianchel ber, said series ofplugs cofin'plrisiri'gqcojici'v an` ended members :withan-anhu1ar1sriesio`f -body ducts"- lnd inwardly ducts and an interveningprtioiiiritha- 9 5 l l peripheralt groove and-a iizle ."i" fitted to themixing j 'I i .3. A @maar the described f' prisng vivf-handle member"separate connections and:l gages; slimme-chamber i incassa 1 @peritellead; ir-estan trollable "injector in member and mixing-'chaxnben-mefbr;

-luiving an initial mixing chamber into w ich the two gases .are sedelivered', a seriesof plu succeeding themv shimber, 'said series.comprising ,.conlcav' -ended no. members with an bodyannular-=senes`pfnducts and inwardly' drectedf delivery ducts,- and an interveningportiongwitha helical. 4 peripheral groove, said 4ductsf 'and "grooveforming a tortiious mixing passa' 4 5. In a torch for the-descripurpose, having an initial' mixing chamber into which the two gasesareseparately delivered, a. series of lugs succeeding the mixingvhambrr, sai(` series comprising concaved- 1:30

llbt

body ducts and inwardly directed delivery ducts, and an intervemngportion with a helical peripheral groove, said ducts and groove forminga tortuous mixlng passage;

n4 nozzlemember fitted to the mixing-chamber-member; and a tip fitted tothe nozzlemember, said nozzle member and tip being jacket/ed.

6. A torch for the described purpose comprising a handle member providedwith separate Connections and passages for the gases; amixing-chamber-member into which said passages separately lead; acontrollable inject-or assemblage intermediate the handle member andmixing-chambermember; said injector assemblage comprising a shell fittedto the handle member, a

valve-seat member in said shell around which one of the gases passes, anormallyretracted sl'iring-controllled needle valve in said valve seatmember having a helical peripheral groove through which the other gaspasses and an adjusting screw tted in the side wall of the shell andbearing on the inner end of the needle-valve; and a. .nozzle member ttedto the mixing chamber member.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing Witnesses.

MICHAEL FISCHER.

Witnesses WM. F. BOOTH, D. B. )RxoHAnDs

